Closed-End Strategy: Senior Loan and Limited Duration Portfolio 2018-1 Closed-End Strategy: Global Income Portfolio 2018-1 The unit investment trusts named above (the Portfolios ), included in Invesco Unit Trusts, Series 1837, each invest in a portfolio of closed-end investment companies (known as closed-end funds ). Of course, we cannot guarantee that a Portfolio will achieve its objective. An investment can be made in the underlying funds directly rather than through a Portfolio. These direct investments can be made without paying a Portfolio s sales charge, operating expenses and organization costs. January 19, 2018 You should read this prospectus and retain it for future reference. The Securities and Exchange Commission has not approved or disapproved of the Units or passed upon the adequacy or accuracy of this prospectus. Any contrary representation is a criminal offense. INVESCO
Closed-End Strategy: Senior Loan and Limited Duration Portfolio Investment Objective. The Portfolio seeks to provide current income and the potential for capital appreciation. Principal Investment Strategy. The Portfolio seeks to achieve its objective by investing in a portfolio primarily consisting of common stock of closed-end investment companies (known as closed-end funds ) that invest in senior corporate loans or other debt securities of limited duration. Duration is a measure of the sensitivity of a debt security s price to changes in interest rates, expressed in years. Higher durations signify greater price volatility. Invesco Capital Markets, Inc. is the Sponsor of the Portfolio. In selecting securities for the Portfolio, the Sponsor sought to invest in funds representative of asset classes with generally attractive senior loan and limited duration income opportunities. In addition, the Sponsor assembled the final portfolio based on consideration of factors including, but not limited to: Manager Performance Performance relative to its benchmark and peer group Valuation Premium/Discount to net asset value relative to itself and its peer group Dividend Current dividend level and sustainability Diversification Analysis of asset class mix Credit Quality Analysis of fixed income holdings Liquidity Analysis of fund trading volume Approximately 41% of the closed-end funds in the Portfolio are funds classified as non-diversified under the Investment Company Act of 1940. These funds have the ability to invest a greater portion of their assets in obligations of a single issuer. As a result, these funds may be more susceptible to volatility than a more diversified fund. Of course, we cannot guarantee that your Portfolio will achieve its objective. The value of your Units may fall below the price you paid for the Units. You should read the Risk Factors section before you invest. The Portfolio is designed as part of a long-term investment strategy. The Sponsor may offer a subsequent series of the portfolio when the current Portfolio terminates. As a result, you may achieve more consistent overall results by following the strategy through reinvestment of your proceeds over several years if subsequent series are available. Repeatedly rolling over an investment in a unit investment trust may differ from long-term investments in other investment products when considering the sales charges, fees, expenses and tax consequences attributable to a Unitholder. For more information see Rights of Unitholders--Rollover. Principal Risks. As with all investments, you can lose money by investing in this Portfolio. The Portfolio also might not perform as well as you expect. This can happen for reasons such as these: Security prices will fluctuate. The value of your investment may fall over time. The Portfolio invests in shares of closed-end funds. You should understand the section titled Closed-End Funds before you invest. In particular, shares of these funds tend to trade at a discount from their net asset value and are subject to risks related to factors such as management s ability to achieve a fund s objective, market conditions affecting a fund s investments and use of leverage. The underlying funds have management and operating expenses. You will bear not only your share of the Portfolio s expenses, but also the expenses of the underlying funds. By investing in other funds, the Portfolio incurs greater expenses than you would incur if you invested directly in the funds. The value of fixed income securities in the closed-end funds will generally fall if interest rates rise. Given the historically low interest rate environment in the U.S., risks 2
associated with rising rates are heightened. The negative impact on fixed income securities from any interest rate increases could be swift and significant. No one can predict whether interest rates will rise or fall in the future. In the future, a closed-end fund may be unable or unwilling to make dividend payments, and senior loan borrowers may be unable to make payments of interest or principal. Any of these events may reduce the level of dividends a closed-end fund pays which would reduce your income and cause the value of your Units to fall. The financial condition of a loan borrower may worsen or its credit ratings may drop, resulting in a reduction in the value of your units. This may occur at any point in time, including during the primary offering period. You could experience dilution of your investment if the size of the Portfolio is increased as Units are sold. There is no assurance that your investment will maintain its proportionate share in the Portfolio s profits and losses. The closed-end funds held by the Portfolio invest in senior loans. Although senior loans in which the closed-end funds invest may be secured by specific collateral, there can be no assurance that liquidation of collateral would satisfy the borrower s obligation in the event of non-payment of scheduled principal or interest or that such collateral could be readily liquidated. Senior loans in which the closed-end funds invest generally are of below investment grade credit quality, may be unrated at the time of investment, generally are not registered with the Securities and Exchange Commission or any state securities commission, and generally are not listed on any securities exchange. In addition, the amount of public information available on senior loans generally is less extensive than that available for other types of assets. The yield on closed-end funds investing in senior loans may fluctuate with changes in interest rates. Generally, yields on senior loans decline in a falling interest rate environment and increase in a rising interest rate environment. Because interest rates on senior loans are reset periodically, an increase in interest rates may not be immediately reflected in the rates of the loans. The closed-end funds may invest in securities rated below investment grade and considered to be junk or highyield securities. Securities rated below BBB- by Standard & Poor s or below Baa3 by Moody s are considered to be below investment grade. These securities are considered to be speculative and are subject to greater market and credit risks. Accordingly, the risk of default is higher than with investment grade securities. In addition, these securities may be more sensitive to interest rate changes and may be more likely to make early returns of principal. We do not actively manage the Portfolio. While the closed-end funds have managed portfolios, except in limited circumstances, the Portfolio will hold, and may continue to buy, shares of the same funds even if their market value declines. 3
Fee Table The amounts below are estimates of the direct and indirect expenses that you may incur based on a $10 Public Offering Price per Unit. Actual expenses may vary. As a % of Public Amount Offering Per 100 Sales Charge Price Units Initial sales charge 0.000% $ 0.000 Deferred sales charge 2.250 22.500 Creation and development fee 0.500 5.000 Maximum sales charge 2.750% $27.500 As a % Amount of Net Per 100 Assets Units Estimated Organization Costs 0.420% $ 4.070 Estimated Annual Expenses Trustee s fee and operating expenses 0.199% $ 1.920 Supervisory, bookkeeping and administrative fees 0.054 0.526 Underlying fund expenses 2.608 25.257 Total 2.861% $27.703* Example This example helps you compare the cost of the Portfolio with other unit trusts and mutual funds. In the example we assume that the expenses do not change and that the Portfolio s annual return is 5%. Your actual returns and expenses will vary. This example also assumes that you continue to follow the Portfolio strategy and roll your investment, including all distributions, into a new trust every two years subject to a sales charge of 2.75%. Based on these assumptions, you would pay the following expenses for every $10,000 you invest in the Portfolio: 1 year $ 593 3 years 1,465 5 years 2,344 10 years 4,407 * The estimated annual expenses are based upon the estimated trust size for the Portfolio determined as of the initial date of deposit. Because certain of the operating expenses are fixed amounts, if the Portfolio does not reach the estimated size, or if the value of the Portfolio or number of outstanding units decline over the life of the trust, or if the actual amount of the operating expenses exceeds the estimated amounts, the actual amount of the operating expenses per 100 units would exceed the estimated amounts. In some cases, the actual amount of operating expenses may substantially differ from the amounts reflected above. 4 The maximum sales charge is 2.75% of the Public Offering Price per Unit. There is no initial sales charge at a Public Offering Price of $10 or less. If the Public Offering Price exceeds $10 per Unit, the initial sales charge is the difference between the total sales charge (maximum of 2.75% of the Public Offering Price) and the sum of the remaining deferred sales charge and the creation and development fee. The deferred sales charge is fixed at $0.225 per Unit and accrues daily from May 10, 2018 through October 9, 2018. Your Portfolio pays a proportionate amount of this charge on the 10th day of each month beginning in the accrual period until paid in full. The combination of the initial and deferred sales charges comprises the transactional sales charge. The creation and development fee is fixed at $0.05 per unit and is paid at the earlier of the end of the initial offering period (anticipated to be three months) or six months following the Initial Date of Deposit. For more detail, see Public Offering Price - General. Although not an actual operating expense, the Portfolio, and therefore the Unitholders, will indirectly bear the operating expenses of the funds held by the Portfolio in the estimated amount provided above. Estimated fund expenses are based upon the net asset value of the number of fund shares held by the Portfolio per Unit multiplied by the annual operating expenses of the funds for the most recent fiscal year. The Trustee or Sponsor will waive fees otherwise payable by the Portfolio in an amount equal to any 12b-1 fees or other compensation the Trustee, the Sponsor or an affiliate receives from the funds in connection with the Portfolio s investment in the funds, including license fees receivable by an affiliate of the Sponsor from a fund. Essential Information Unit Price at Initial Date of Deposit $10.0000 Initial Date of Deposit January 19, 2018 Mandatory Termination Date January 17, 2020 Estimated Net Annual Income 1,2 Record Dates 2 Distribution Dates 2 CUSIP Numbers $0.73846 per Unit 10th day of each month 25th day of each month Cash 46140W624 Reinvest 46140W632 Wrap Fee Cash 46140W640 Wrap Fee Reinvest 46140W657 1 As of close of business day prior to Initial Date of Deposit. The actual distributions you receive will vary from the estimated amount due to changes in the Portfolio s fees and expenses, in actual income received by the Portfolio, currency fluctuations and with changes in the Portfolio such as the acquisition or liquidation of securities. See Rights of Unitholders--Estimated Distributions. 2 The Trustee will make distributions of income and capital on each monthly Distribution Date to Unitholders of record on the preceding Record Date, provided that the total cash held for distribution equals at least $0.01 per Unit. Undistributed income and capital will be distributed in the next month in which the total cash held for distribution equals at least $0.01 per Unit. Based on the foregoing, it is currently estimated that the initial distribution will occur in March 2018.
Closed-End Strategy: Senior Loan and Limited Duration Portfolio 2018-1 Portfolio Current Cost of Number Market Value Dividend Securities to of Shares Name of Issuer (1) per Share (2) Yield (3) Portfolio (2) Limited Duration - 30.03% 477 Apollo Tactical Income Fund, Inc. $ 15.580 7.70% $ 7,431.66 464 Barings Global Short Duration High Yield Fund 19.170 9.28 8,894.88 465 Guggenheim Credit Allocation Fund 22.340 9.74 10,388.10 792 Wells Fargo Multi-Sector Income Fund 13.070 9.90 10,351.44 1,068 Western Asset High Income Fund II, Inc. 6.940 7.95 7,411.92 Senior Loan - 69.97% 819 Aberdeen Income Credit Strategies Fund 14.290 10.08 11,703.51 637 Ares Dynamic Credit Allocation Fund, Inc. 16.300 7.91 10,383.10 648 Blackstone / GSO Long-Short Credit Income Fund 16.060 7.70 10,406.88 502 Blackstone / GSO Senior Floating Rate Term Fund 17.630 6.60 8,850.26 752 Blackstone / GSO Strategic Credit Fund 15.800 7.97 11,881.60 413 Eaton Vance Floating-Rate Income Trust 14.370 5.59 5,934.81 415 Eaton Vance Senior Floating-Rate Trust 14.270 5.89 5,922.05 917 Eaton Vance Senior Income Trust 6.470 5.56 5,932.99 * 622 Invesco Dynamic Credit Opportunities Fund 11.830 6.34 7,358.26 1,375 Nuveen Senior Income Fund 6.470 7.33 8,896.25 538 Nuveen Short Duration Credit Opportunities Fund 16.580 7.67 8,920.04 440 THL Credit Senior Loan Fund 16.930 6.80 7,449.20 11,344 $ 148,116.95 See Notes to Portfolios. 5
Closed-End Strategy: Global Income Portfolio Investment Objective. The Portfolio seeks to provide current income and the potential for capital appreciation. Principal Investment Strategy. The Portfolio seeks to achieve its objective by investing in a portfolio consisting of common stocks of closed-end investment companies (known as closed-end funds ) that invest in various global equity and fixed income securities. These closed-end funds may invest in a wide range of sectors and strategies such as global real estate, global stocks, global bonds, preferred securities, covered call option strategies, convertible securities, emerging markets bonds and other total return strategies. Invesco Capital Markets, Inc. is the Sponsor of the Portfolio. In selecting securities for the Portfolio, the Sponsor sought to invest in funds that have significant global investment exposure. In addition, the Sponsor assembled the final portfolio based on factors including valuation, current yield, share price at a discount to net asset value, credit quality and asset class mix of each of the underlying funds. In selecting securities for the Portfolio, the Sponsor sought to invest in funds representative of asset classes with generally attractive global income opportunities. In addition, the Sponsor assembled the final portfolio based on consideration of factors including, but not limited to: Manager Performance Performance relative to its benchmark and peer group Valuation Premium/Discount to net asset value relative to itself and its peer group Dividend Current dividend level and sustainability Diversification Analysis of asset class mix Credit Quality Analysis of fixed income holdings Liquidity Analysis of fund trading volume Approximately 40% of the closed-end funds in the Portfolio are funds classified as non-diversified under the Investment Company Act of 1940. These funds have the ability to invest a greater portion of their assets in obligations of a single issuer. As a result, these funds may be more susceptible to volatility than a more diversified fund. Of course, we cannot guarantee that your Portfolio will achieve its objective. The value of your Units may fall below the price you paid for the Units. You should read the Risk Factors section before you invest. The Portfolio is designed as part of a long-term investment strategy. The Sponsor may offer a subsequent series of the portfolio when the current Portfolio terminates. As a result, you may achieve more consistent overall results by following the strategy through reinvestment of your proceeds over several years if subsequent series are available. Repeatedly rolling over an investment in a unit investment trust may differ from long-term investments in other investment products when considering the sales charges, fees, expenses and tax consequences attributable to a Unitholder. For more information see Rights of Unitholders--Rollover. Principal Risks. As with all investments, you can lose money by investing in this Portfolio. The Portfolio also might not perform as well as you expect. This can happen for reasons such as these: Security prices will fluctuate. The value of your investment may fall over time. The Portfolio invests in shares of closed-end funds. You should understand the section titled Closed-End Funds before you invest. In particular, shares of these funds tend to trade at a discount from their net asset value and are subject to risks related to factors such as management s ability to achieve a fund s objective, market conditions affecting a fund s investments and use of leverage. The underlying funds have management and operating expenses. You will bear not only your 6
share of the Portfolio s expenses, but also the expenses of the underlying funds. By investing in other funds, the Portfolio incurs greater expenses than you would incur if you invested directly in the funds. The value of fixed income securities in the closed-end funds will generally fall if interest rates rise. Given the historically low interest rate environment in the U.S., risks associated with rising rates are heightened. The negative impact on fixed income securities from any interest rate increases could be swift and significant. No one can predict whether interest rates will rise or fall in the future. A security issuer may be unable to make payments of interest, dividends or principal in the future. This may reduce the level of dividends a closed-end fund pays which would reduce your income and cause the value of your Units to fall. The financial condition of a security issuer may worsen or its credit ratings may drop, resulting in a reduction in the value of your Units. This may occur at any point in time, including during the primary offering period. You could experience dilution of your investment if the size of the Portfolio is increased as Units are sold. There is no assurance that your investment will maintain its proportionate share in the Portfolio s profits and losses. The closed-end funds may invest in securities of foreign issuers, presenting risks beyond those of U.S. issuers. These risks may include market and political factors related to an issuer s foreign market, international trade conditions, less regulation, smaller or less liquid markets, increased volatility, differing accounting and tax practices and changes in the value of foreign currencies which may have both economic and tax consequences. The closed-end funds may invest in securities rated below investment grade and considered to be junk or highyield securities. Securities rated below BBB- by Standard & Poor s or below Baa3 by Moody s are considered to be below investment grade. These securities are considered to be speculative and are subject to greater market and credit risks. Accordingly, the risk of default is higher than with investment grade securities. In addition, these securities may be more sensitive to interest rate changes and may be more likely to make early returns of principal. Certain of the closed-end funds held by the Portfolio invest in preferred securities. Preferred securities are typically subordinated to bonds and other debt instruments in a company s capital structure in terms of priority to corporate income and therefore are subject to greater risk than those debt instruments. Preferred securities are subject to interest rate risk, meaning that their values may fall if interest rates, in general, rise. In addition to the other risks described herein, income payments on certain preferred securities may be deferred which may reduce the amount of income you receive on your Units. Certain of the closed-end funds held by the Portfolio invest in shares of REITs and other real estate companies. Shares of REITs and other real estate companies may appreciate or depreciate in value, or pay dividends depending upon global and local economic conditions, changes in interest rates and the strength or weakness of the overall real estate market. Negative developments in the real estate industry will affect the value of your investment more than would be the case in a more diversified investment. 7
Certain of the closed-end funds held by the Portfolio invest in senior loans. Although senior loans in which the closedend funds invest may be secured by specific collateral, there can be no assurance that liquidation of collateral would satisfy the borrower s obligation in the event of non-payment of scheduled principal or interest or that such collateral could be readily liquidated. Senior loans in which the closed-end funds invest generally are of below investment grade credit quality, may be unrated at the time of investment, generally are not registered with the Securities and Exchange Commission or any state securities commission, and generally are not listed on any securities exchange. In addition, the amount of public information available on senior loans generally is less extensive than that available for other types of assets. The yield on closed-end funds investing in senior loans may fluctuate with changes in interest rates. Generally, yields on senior loans decline in a falling interest rate environment and increase in a rising interest rate environment. Because interest rates on senior loans are reset periodically, an increase in interest rates may not be immediately reflected in the rates of the loans. Certain of the funds held by the Portfolio write call options on their assets. The use of options may require an underlying fund to sell portfolio securities at inopportune times or at prices other than current market values, may limit the amount of appreciation a fund can realize on an investment, or may cause a fund to hold a security it might otherwise sell. To the extent an underlying fund purchases options pursuant to a hedging strategy, the fund could lose its entire investment in the option. We do not actively manage the Portfolio. While the closed-end funds have managed portfolios, except in limited circumstances, the Portfolio will hold, and may continue to buy, shares of the same funds even if their market value declines. 8
Fee Table The amounts below are estimates of the direct and indirect expenses that you may incur based on a $10 Public Offering Price per Unit. Actual expenses may vary. As a % of Public Amount Offering Per 100 Sales Charge Price Units Initial sales charge 0.000% $ 0.000 Deferred sales charge 2.250 22.500 Creation and development fee 0.500 5.000 Maximum sales charge 2.750% $27.500 As a % Amount of Net Per 100 Assets Units Estimated Organization Costs 0.517% $ 5.000 Estimated Annual Expenses Trustee s fee and operating expenses 0.313% $ 3.033 Supervisory, bookkeeping and administrative fees 0.055 0.530 Underlying fund expenses 1.952 18.884 Total 2.320% $22.447* Example This example helps you compare the cost of the Portfolio with other unit trusts and mutual funds. In the example we assume that the expenses do not change and that the Portfolio s annual return is 5%. Your actual returns and expenses will vary. This example also assumes that you continue to follow the Portfolio strategy and roll your investment, including all distributions, into a new trust every two years subject to a sales charge of 2.75%. Based on these assumptions, you would pay the following expenses for every $10,000 you invest in the Portfolio: 1 year $ 549 3 years 1,332 5 years 2,129 10 years 4,007 * The estimated annual expenses are based upon the estimated trust size for the Portfolio determined as of the initial date of deposit. Because certain of the operating expenses are fixed amounts, if the Portfolio does not reach the estimated size, or if the value of the Portfolio or number of outstanding units decline over the life of the trust, or if the actual amount of the operating expenses exceeds the estimated amounts, the actual amount of the operating expenses per 100 units would exceed the estimated amounts. In some cases, the actual amount of operating expenses may substantially differ from the amounts reflected above. 9 The maximum sales charge is 2.75% of the Public Offering Price per Unit. There is no initial sales charge at a Public Offering Price of $10 or less. If the Public Offering Price exceeds $10 per Unit, the initial sales charge is the difference between the total sales charge (maximum of 2.75% of the Public Offering Price) and the sum of the remaining deferred sales charge and the creation and development fee. The deferred sales charge is fixed at $0.225 per Unit and accrues daily from May 10, 2018 through October 9, 2018. Your Portfolio pays a proportionate amount of this charge on the 10th day of each month beginning in the accrual period until paid in full. The combination of the initial and deferred sales charges comprises the transactional sales charge. The creation and development fee is fixed at $0.05 per unit and is paid at the earlier of the end of the initial offering period (anticipated to be three months) or six months following the Initial Date of Deposit. For more detail, see Public Offering Price - General. Although not an actual operating expense, the Portfolio, and therefore the Unitholders, will indirectly bear the operating expenses of the funds held by the Portfolio in the estimated amount provided above. Estimated fund expenses are based upon the net asset value of the number of fund shares held by the Portfolio per Unit multiplied by the annual operating expenses of the funds for the most recent fiscal year. The Trustee or Sponsor will waive fees otherwise payable by the Portfolio in an amount equal to any 12b-1 fees or other compensation the Trustee, the Sponsor or an affiliate receives from the funds in connection with the Portfolio s investment in the funds, including license fees receivable by an affiliate of the Sponsor from a fund. Essential Information Unit Price at Initial Date of Deposit $10.0000 Initial Date of Deposit January 19, 2018 Mandatory Termination Date January 17, 2020 Estimated Net Annual Income 1,2 $0.71237 per Unit Record Dates 2 10th day of each month Distribution Dates 2 25th day of each month CUSIP Numbers Cash 46140W582 Reinvest 46140W590 Wrap Fee Cash 46140W608 Wrap Fee Reinvest 46140W616 1 As of close of business day prior to Initial Date of Deposit. The actual distributions you receive will vary from the estimated amount due to changes in the Portfolio s fees and expenses, in actual income received by the Portfolio, currency fluctuations and with changes in the Portfolio such as the acquisition or liquidation of securities. See Rights of Unitholders--Estimated Distributions. 2 The Trustee will make distributions of income and capital on each monthly Distribution Date to Unitholders of record on the preceding Record Date, provided that the total cash held for distribution equals at least $0.01 per Unit. Undistributed income and capital will be distributed in the next month in which the total cash held for distribution equals at least $0.01 per Unit. Based on the foregoing, it is currently estimated that the initial distribution will occur in February 2018.
Closed-End Strategy: Global Income Portfolio 2018-1 Portfolio Current Cost of Number Market Value Dividend Securities to of Shares Name of Issuer (1) per Share (2) Yield (3) Portfolio (2) Covered Call and Income - 12.04% 884 BlackRock Enhanced International Dividend Trust $ 6.730 6.78% $ 5,949.32 595 Cohen & Steers Global Income Builder, Inc. 10.040 8.25 5,973.80 515 Voya Global Advantage and Premium Opportunity Fund 11.570 7.78 5,958.55 Emerging Market Equity - 4.00% 629 Voya Emerging Markets High Dividend Equity Fund 9.450 7.83 5,944.05 Emerging Market Income - 7.97% 737 Morgan Stanley Emerging Markets Domestic Debt Fund, Inc. 8.050 7.45 5,932.85 382 Stone Harbor Emerging Markets Total Income Fund 15.440 11.74 5,898.08 Equity Tax-Advantaged - 8.02% 331 Eaton Vance Tax-Advantaged Global Dividend Income Fund 17.950 6.85 5,941.45 327 Nuveen Tax-Advantaged Dividend Growth Fund 18.230 6.80 5,961.21 Global Equity - 4.05% 206 BlackRock Science & Technology Trust 29.190 5.34 6,013.14 Global Equity Dividend - 4.00% 528 Alpine Global Dynamic Dividend Fund 11.260 6.93 5,945.28 Global Growth & Income - 8.00% 633 Calamos Global Dynamic Income Fund 9.430 8.91 5,969.19 314 Lazard Global Total Return and Income Fund, Inc. 18.820 7.37 5,909.48 Global Income - 12.00% 509 First Trust/Aberdeen Global Opportunity Income Fund 11.720 7.68 5,965.48 347 Nuveen Global High Income Fund 17.090 8.43 5,930.23 584 Western Asset Global High Income Fund, Inc. 10.130 7.52 5,915.92 Global Real Estate - 8.02% 880 Alpine Global Premier Properties Fund 6.740 8.90 5,931.20 337 Nuveen Real Asset Income and Growth Fund 17.720 7.18 5,971.64 10
Closed-End Strategy: Global Income Portfolio 2018-1 Portfolio (continued) Current Cost of Number Market Value Dividend Securities to of Shares Name of Issuer (1) per Share (2) Yield (3) Portfolio (2) High-Yield - 7.99% 309 Barings Global Short Duration High Yield Fund $ 19.170 9.28% $ 5,923.53 638 New America High Income Fund, Inc. 9.310 7.09 5,939.78 Investment Grade - 3.99% 335 John Hancock Investors Trust 17.680 8.05 5,922.80 Limited Duration - 4.00% 426 Eaton Vance Short Duration Diversified Income Fund 13.940 6.59 5,938.44 Multi-Sector - 3.97% 289 DoubleLine Income Solutions Fund 20.390 8.83 5,892.71 Preferred and Income - 4.00% 252 First Trust Intermediate Duration Preferred & Income Fund 23.540 7.77 5,932.08 Senior Loan - 3.97% * 498 Invesco Dynamic Credit Opportunities Fund 11.830 6.34 5,891.34 Utilities - 3.98% 252 Cohen & Steers Infrastructure Fund, Inc. 23.470 7.93 5,914.44 11,737 $ 148,465.99 See Notes to Portfolios. 11
Notes to Portfolios (1) The Securities are initially represented by regular way contracts for the performance of which an irrevocable letter of credit has been deposited with the Trustee. Contracts to acquire Securities were entered into on January 18, 2018 and have a settlement date of January 22, 2018 (see The Portfolios ). (2) The value of each Security is determined on the bases set forth under Public Offering--Unit Price as of the close of the New York Stock Exchange on the business day before the Initial Date of Deposit. In accordance with FASB Accounting Standards Codification ( ASC ), ASC 820, Fair Value Measurements and Disclosures, the Portfolio s investments are classified as Level 1, which refers to security prices determined using quoted prices in active markets for identical securities. Other information regarding the Securities, as of the Initial Date of Deposit, is as follows: Profit Cost to (Loss) To Sponsor Sponsor Closed-End Strategy: Senior Loan and Limited Duration Portfolio................................ $ 148,401 $ (284) Closed-End Strategy: Global Income Portfolio............. $ 148,760 $ (294) * The investment advisor of this fund is an affiliate of the Sponsor. (3) Current Dividend Yield for each Security is based on the estimated annual dividends per share and the Security s value as of the most recent close of trading on the New York Stock Exchange on the business day before the Initial Date of Deposit. Generally, estimated annual dividends per share are calculated by annualizing the most recently declared regular dividends or by adding the most recent regular interim and final dividends declared and reflect any foreign withholding taxes. In certain cases, this calculation may consider several recently declared dividends in order for the Current Dividend Yield to be more reflective of recent historical dividend rates. 12
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Sponsor and Unitholders of Invesco Unit Trusts, Series 1837: Opinion on the Financial Statements We have audited the accompanying statements of condition (including the related portfolio schedules) of Closed-End Strategy: Senior Loan and Limited Duration Portfolio 2018-1 and Closed-End Strategy: Global Income Portfolio 2018-1 (included in Invesco Unit Trusts, Series 1837 (the Trust )) as of January 19, 2018, and the related notes (collectively referred to as the financial statements ). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Trust as of January 19, 2018, in conformity with accounting principles generally accepted in the United States of America. Basis for Opinion These financial statements are the responsibility of Invesco Capital Markets, Inc., Sponsor. Our responsibility is to express an opinion on the Trust s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) ( PCAOB ) and are required to be independent with respect to the Trust in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB. We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Trust is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Trust s internal control over financial reporting. Accordingly, we express no such opinion. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by the Sponsor, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of cash or irrevocable letters of credit deposited for the purchase of securities as shown in the statements of condition as of January 19, 2018 by correspondence with The Bank of New York Mellon, Trustee. We believe that our audits provide a reasonable basis for our opinion. /s/ GRANT THORNTON LLP We have served as the auditor of one or more of the unit investment trusts, sponsored by Invesco Capital Markets, Inc. and its predecessors, since 1976. New York, New York January 19, 2018 13
STATEMENTS OF CONDITION As of January 19, 2018 Closed-End Strategy: Senior Closed-End Loan and Strategy: Limited Global Duration Income INVESTMENT IN SECURITIES Portfolio Portfolio Contracts to purchase Securities (1)........................................... $ 148,117 $ 148,466 Total............................................................... $ 148,117 $ 148,466 LIABILITIES AND INTEREST OF UNITHOLDERS Liabilities-- Organization costs (2).................................................. $ 603 $ 742 Deferred sales charge liability (3).......................................... 3,333 3,341 Creation and development fee liability (4).................................... 741 742 Interest of Unitholders-- Cost to investors (5).................................................... 148,117 148,466 Less: deferred sales charge, creation and development fee and organization costs (2)(4)(5)(6)................................... 4,677 4,825 Net interest to Unitholders (5)......................................... 143,440 143,641 Total............................................................... $ 148,117 $ 148,466 Units outstanding......................................................... 14,812 14,847 Net asset value per Unit.................................................... $ 9.684 $ 9.675 (1) The value of the Securities is determined by the Trustee on the bases set forth under Public Offering--Unit Price. The contracts to purchase Securities are collateralized by separate irrevocable letters of credit which have been deposited with the Trustee. (2) A portion of the Public Offering Price represents an amount sufficient to pay for all or a portion of the costs incurred in establishing a Portfolio. The amount of these costs are set forth in the Fee Table. A distribution will be made as of the earlier of the close of the initial offering period (approximately three months) or six months following the Initial Date of Deposit to an account maintained by the Trustee from which the organization expense obligation of the investors will be satisfied. To the extent that actual organization costs of a Portfolio are greater than the estimated amount, only the estimated organization costs added to the Public Offering Price will be reimbursed to the Sponsor and deducted from the assets of the Portfolio. (3) Represents the amount of mandatory distributions from a Portfolio on the bases set forth under Public Offering. (4) The creation and development fee is payable by a Portfolio on behalf of Unitholders out of the assets of the Portfolio as of the close of the initial offering period. If Units are redeemed prior to the close of the initial public offering period, the fee will not be deducted from the proceeds. (5) The aggregate public offering price and the aggregate sales charge are computed on the bases set forth under Public Offering. (6) Assumes the maximum sales charge. 14
THE PORTFOLIOS The Portfolios were created under the laws of the State of New York pursuant to a Trust Indenture and Trust Agreement (the Trust Agreement ), dated the date of this prospectus (the Initial Date of Deposit ), among Invesco Capital Markets, Inc., as Sponsor, Invesco Investment Advisers LLC, as Supervisor and The Bank of New York Mellon, as Trustee. Each Portfolio offers investors the opportunity to purchase Units representing proportionate interests in a portfolio of shares of closed-end funds. Each Portfolio may be an appropriate medium for investors who desire to participate in a portfolio of securities with greater diversification than they might be able to acquire individually. On the Initial Date of Deposit, the Sponsor deposited delivery statements relating to contracts for the purchase of the Securities and an irrevocable letter of credit in the amount required for these purchases with the Trustee. In exchange for these contracts the Trustee delivered to the Sponsor documentation evidencing the ownership of Units of the Portfolios. Unless otherwise terminated as provided in the Trust Agreement, a Portfolio will terminate on the Mandatory Termination Date and any remaining Securities will be liquidated or distributed by the Trustee within a reasonable time. As used in this prospectus the term Securities means the securities (including contracts to purchase these securities) listed in each Portfolio and any additional securities deposited into a Portfolio. Additional Units of a Portfolio may be issued at any time by depositing in the Portfolio (i) additional Securities, (ii) contracts to purchase Securities together with cash or irrevocable letters of credit or (iii) cash (or a letter of credit or the equivalent) with instructions to purchase additional Securities. As additional Units are issued by a Portfolio, the aggregate value of the Securities will be increased and the fractional undivided interest represented by each Unit may be decreased. The Sponsor may continue to make additional deposits into a Portfolio following the Initial Date of Deposit provided that the additional deposits will be in amounts which will maintain, as nearly as practicable, the same percentage relationship among the number of shares of each Security in the Portfolio that existed immediately prior to the subsequent deposit. Investors may experience a dilution of their investments and a reduction in their anticipated income because of fluctuations in the prices of the Securities between the time of the deposit and the purchase of the Securities and because a Portfolio will pay the associated brokerage or acquisition fees. In addition, during the initial offering of Units it may not be possible to buy a particular Security due to regulatory or trading restrictions, or corporate actions. While such limitations are in effect, additional Units would be created by purchasing each of the Securities in your Portfolio that are not subject to those limitations. This would also result in the dilution of the investment in any such Security not purchased and potential variances in anticipated income. Purchases and sales of Securities by your Portfolio may impact the value of the Securities. This may especially be the case during the initial offering of Units, upon Portfolio termination and in the course of satisfying large Unit redemptions. Each Unit of your Portfolio initially offered represents an undivided interest in the Portfolio. At the close of the New York Stock Exchange on the Initial Date of Deposit, the number of Units may be adjusted so that the Public Offering Price per Unit equals $10. The number of Units, fractional interest of each Unit in your Portfolio and the estimated distributions per Unit will increase or decrease to the extent of any adjustment. To the extent that any Units are redeemed by the Trustee or additional Units are issued as a result of additional Securities being deposited by the Sponsor, the fractional undivided interest in your Portfolio represented by each unredeemed Unit will increase or decrease accordingly, although the actual interest in your Portfolio will remain unchanged. Units will remain outstanding until redeemed upon tender to the Trustee by Unitholders, which may include the Sponsor, or until the termination of the Trust Agreement. Each Portfolio consists of (a) the Securities (including contracts for the purchase thereof) listed under the applicable Portfolio as may continue to be held from time to time in the Portfolio, (b) any additional Securities acquired and held by the Portfolio pursuant to the provisions of the Trust Agreement and (c) any cash held in the related Income and Capital Accounts. Neither the A-1
Sponsor nor the Trustee shall be liable in any way for any contract failure in any of the Securities. OBJECTIVES AND SECURITIES SELECTION The objective of each Portfolio is described in the individual Portfolio sections. There is no assurance that a Portfolio will achieve its objective. The Sponsor does not manage the Portfolios. You should note that the Sponsor applied the selection criteria to the Securities for inclusion in the Portfolios prior to the Initial Date of Deposit. After this time, the Securities may no longer meet the selection criteria. Should a Security in your Portfolio no longer meet the selection criteria, it will generally not be removed from the Portfolio. In offering the Units to the public, neither the Sponsor nor any broker-dealers are recommending any of the individual Securities but rather the entire pool of Securities in the Portfolios, taken as a whole, which are represented by the Units. CLOSED-END FUNDS Closed-end funds are a type of investment company that hold an actively managed portfolio of securities. Closed-end funds issue shares in closed-end offerings which generally trade on a stock exchange (although some closed-end fund shares are not listed on a securities exchange). The funds in the Portfolios all are currently listed on a securities exchange. Since closed-end funds maintain a relatively fixed pool of investment capital, portfolio managers may be better able to adhere to their investment philosophies through greater flexibility and control. In addition, closed-end funds don t have to manage fund liquidity to meet potentially large redemptions. Closed-end funds are subject to various risks, including management s ability to meet the closed-end fund s investment objective, and to manage the closedend fund portfolio when the underlying securities are redeemed or sold, during periods of market turmoil and as investors perceptions regarding closed-end funds or their underlying investments change. Shares of closed-end funds frequently trade at a discount from their net asset value in the secondary market. This risk is separate and distinct from the risk that the net asset value of closed-end fund shares may decrease. The amount of such discount from net asset value is subject to change from time to time in response to various factors. The closed-end funds included in the Portfolios may employ the use of leverage in their portfolios through the issuance of preferred stock or other methods. While leverage often serves to increase the yield of a closed-end fund, this leverage also subjects the closed-end fund to increased risks. These risks may include the likelihood of increased volatility and the possibility that the closed-end fund s common share income will fall if the dividend rate on the preferred shares or the interest rate on any borrowings rises. The potential inability for a closed-end fund to employ the use of leverage effectively, due to disruptions in the market for the various instruments issued by closed-end funds or other factors, may result in an increase in borrowing costs and a decreased yield for a closed-end fund. Certain of the funds in the Portfolios may be classified as non-diversified under the Investment Company Act of 1940. These funds have the ability to invest a greater portion of their assets in securities of a single issuer which could reduce diversification. Only the Trustee may vote the shares of the closed-end funds held in the Portfolios. The Trustee will vote the shares in the same general proportion as shares held by other shareholders of each fund. Your Portfolio is generally required, however, to reject any offer for securities or other property in exchange for portfolio securities as described under Portfolio Administration--Portfolio Administration. RISK FACTORS All investments involve risk. This section describes the main risks that can impact the value of the securities in your Portfolio or in the underlying funds. You should understand these risks before you invest. If the value of the securities falls, the value of your Units will also fall. We cannot guarantee that your Portfolio will achieve its objective or that your investment return will be positive over any period. A-2
Market Risk. Market risk is the risk that the value of the securities in your Portfolio or in the underlying funds will fluctuate. This could cause the value of your Units to fall below your original purchase price. Market value fluctuates in response to various factors. These can include changes in interest rates, inflation, the financial condition of a security s issuer, perceptions of the issuer, or ratings on a security. Even though your Portfolio is supervised, you should remember that we do not manage your Portfolio. Your Portfolio will not sell a security solely because the market value falls as is possible in a managed fund. Dividend Payment Risk. Dividend payment risk is the risk that an issuer of a security, a fund or an underlying security in a fund is unwilling or unable to pay dividends on a security. Stocks represent ownership interests in the issuers and are not obligations of the issuers. Common stockholders have a right to receive dividends only after the company has provided for payment of its creditors, bondholders and preferred stockholders. Common stocks do not assure dividend payments. Dividends are paid only when declared by an issuer s board of directors and the amount of any dividend may vary over time. If dividends received by a Portfolio are insufficient to cover expenses, redemptions or other Portfolio costs, it may be necessary for the Portfolio to sell Securities to cover such expenses, redemptions or other costs. Any such sales may result in capital gains or losses to you. See Taxation. Interest Rate Risk. Interest rate risk is the risk that the value of securities held by a closed-end fund will fall if interest rates increase. The securities held by the closed-end funds typically fall in value when interest rates rise and rise in value when interest rates fall. The securities held by the closed-end funds with longer periods before maturity are often more sensitive to interest rate changes. Given the historically low interest rate environment in the U.S., risks associated with rising rates are heightened. The negative impact on fixed income securities from any interest rate increases could be swift and significant and, as a result, a rise in interest rates may adversely affect the value of your Units. Credit Risk. Credit risk is the risk that a borrower is unable to meet its obligation to pay principal or interest on a security held by a closed-end fund. This may reduce the level of dividends a closed-end fund pays which would reduce your income and could cause the value of your Units to fall. Closed-End Funds. Each Portfolio invests in shares of closed-end funds. You should understand the preceding section titled Closed-End Funds before you invest. Shares of closed-end funds frequently trade at a discount from their net asset value in the secondary market. This risk is separate and distinct from the risk that the net asset value of fund shares may decrease. The amount of such discount from net asset value is subject to change from time to time in response to various factors. Closed-end funds are subject to various risks, including management s ability to meet the fund s investment objective, and to manage the fund portfolio when the underlying securities are redeemed or sold, during periods of market turmoil and as investors perceptions regarding closed-end funds or their underlying investments change. The Portfolios and the underlying funds have operating expenses. You will bear not only your share of your Portfolio s expenses, but also the expenses of the underlying funds. By investing in other funds, your Portfolio incurs greater expenses than you would incur if you invested directly in the funds. Senior Loans. The Portfolios may invest significantly in closed-end funds that invest in secured senior loans (or senior loans ). Senior loans are debt instruments issued by various financial institutions and other issuers to corporations, partnerships, limited liability companies and other entities to finance leveraged buyouts, recapitalizations, mergers, acquisitions, stock repurchases, debt refinancings and, to a lesser extent, for general operating and other purposes. Senior loans are backed by a company s assets and generally hold the most senior position in a company s capital structure, ahead of other types of debt securities, as well as preferred and common stock. Senior secured loans are typically backed by assets such as inventory, receivables, real estate property, buildings, intellectual property such as patents or trademarks, and even the stock of other companies or subsidiaries. In the event of non-payment, there is no assurance that such collateral could be readily liquidated, or that liquidation would satisfy the borrower s obligation. In addition, while A-3